The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 1992
Filed:
May. 22, 1991
Applicant:
Inventors:
Ronald E Walsh, Jr, Corvallis, OR (US);
Peter W Krag, Albany, OR (US);
Roy E Blackstone, Turner, OR (US);
Duane L Hug, Albany, OR (US);
Assignee:
Teledyne Wah Chang Albany, Albany, OR (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01G / ; C01G / ; C01G / ;
U.S. Cl.
CPC ...
423 79 ; 423 69 ; 423 72 ; 423 75 ; 423 76 ; 423 81 ; 423147 ; 423149 ; 423324 ; 423341 ; 423492 ; 423210 ;
Abstract
An improved halogenator process and system is provided which significantly and economically decreases the level of impurities in the processing of various refractory metals and their halides and particularly hafnium tetrachloride which is condensed from gases produced by the chlorination of Zircon.